US PATENT SUBCLASS 526 / 307.6
.~.~.~.~ Oxygen atom is part of carboxylic acid group

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526 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {8}
72  DF  .~ POLYMERS FROM ONLY ETHYLENIC MONOMERS OR PROCESSES OF POLYMERIZING, POLYMERIZABLE COMPOSITIONS CONTAINING ONLY ETHYLENIC MONOMERS AS REACTANTS OR PROCESSES OF PREPARING {43}
303.1  DF  .~.~ From carboxylic acid amide-containing monomer {9}
307.4  DF  .~.~.~ With monomer containing oxygen {3}
307.6.~.~.~.~ Oxygen atom is part of carboxylic acid group

DEFINITION

Classification: 526/307.6

Oxygen atom is part of carboxylic acid group:

(under subclass 307.4) Subject matter wherein the copolymer is derived from a comonomer containing a caroxylic acid group (e.g., polymer from acrylamide and acrylic acid, etc.).